Hinge pin joint



FIG. 1 is a top perspective view showing a hinge pin joint design;

FIG. 2 is a bottom perspective view showing the hinge pin joint design;

FIG. 3 is a front view showing the hinge pin joint design;

FIG. 4 is a back view showing the hinge pin joint design;

FIG. 5 is a top view showing the hinge pin joint design;

FIG. 6 is a bottom view showing the hinge pin joint design;

FIG. 7 is a right view showing the hinge pin joint design; and,

FIG. 8 is a left view showing the hinge pin joint design. 

CLAIM The ornamental design for a hinge pin joint, as shown and described. 